package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.llm.GreenContentScan;
import com.heima.common.llm.OCR;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.*;
import java.util.List;
import java.util.stream.Collectors;

@Service
@Transactional
@Slf4j
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {
    @Autowired
    private WmNewsMapper wmNewsMapper;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Override
    @Async //标明当前方法是个异步方法
    public void autoScanWmNews(Integer id) {
        //1.查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        if (wmNews == null) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl-文章不存在");
        }
        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())) {
            //从内容中提取纯文本内容和图片
            Map<String, Object> textAndImages = handleTextAndImages(wmNews);
            //自管理的敏感词过滤
            boolean isSenstive = handleSensitiveScan((String) textAndImages.get("content"), wmNews);
            if (!isSenstive) return;
            //2.审核文本内容
            boolean isTextScan = handleTextAScan((String) textAndImages.get("content"), wmNews);
            if (!isTextScan) return;
            //3.审核图片内容
            boolean isImageScan = handleImageScan((List<String>) textAndImages.get("images"), wmNews);
            if (!isImageScan) return;
            //4.审核成功，保存app端相关的文章数据
            ResponseResult responseResult = saveAppArticle(wmNews);
            if (!responseResult.getCode().equals(200)) {
                throw new RuntimeException("WmNewsAutoScanServiceImpl-文章审核，保存app端相关文章数据失败");
            }
            //回填articleId
            wmNews.setArticleId((Long) responseResult.getData());
            updateWmNews(wmNews, (short) 9, "审核成功");
        }
    }

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    /**
     * 自管理的文本审核
     *
     * @param content
     * @param wmNews
     */
    private boolean handleSensitiveScan(String content, WmNews wmNews) {
        boolean flag = true;
        //获取所有的敏感词，初始化敏感词库，查看文章中是否包含敏感词汇
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());
        SensitiveWordUtil.initMap(sensitiveList);
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if(map.size()>0){
            flag = false;
            updateWmNews(wmNews,(short) 2,"当前文章中存在违规内容"+map);
        }
        return flag;
    }

    @Autowired
    private IArticleClient articleClient;
    @Autowired
    private WmChannelMapper wmChannelMapper;
    @Autowired
    private WmUserMapper wmUserMapper;

    /**
     * 保存app端相关的文章数据
     *
     * @param wmNews
     */
    private ResponseResult saveAppArticle(WmNews wmNews) {
        ArticleDto dto = new ArticleDto();
        //属性拷贝
        BeanUtils.copyProperties(wmNews, dto);
        //文章的布局
        dto.setLayout(wmNews.getType());
        //频道
        WmChannel wmChannel = wmChannelMapper.selectById(dto.getChannelId());
        if (wmChannel != null) {
            dto.setChannelName(wmChannel.getName());
        }
        //作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }
        //设置文章id
        if (wmNews.getArticleId() != null) {
            dto.setId(wmNews.getArticleId());
        }
        dto.setCreatedTime(new Date());
        ResponseResult responseResult = articleClient.saveArticle(dto);
        return responseResult;
    }

    @Autowired
    private FileStorageService fileStorageService;
    @Autowired
    private GreenContentScan greenContentScan;
    @Autowired
    private OCR ocr;
    /**
     * 审核图片
     *
     * @param images
     * @param wmNews
     * @return
     */
    private boolean handleImageScan(List<String> images, WmNews wmNews) {
        boolean flag = true;
        if (images == null || images.size() == 0) {
            return flag;
        }
        //下载图片 minIO
        //图片去重
        images = images.stream().distinct().collect(Collectors.toList());
        List<byte[]> imageList=new ArrayList<>();
        try {
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);
                //图片识别
                ByteArrayInputStream in=new ByteArrayInputStream(bytes);
                BufferedImage bufferedImage=ImageIO.read(in);
                Map<String, String> map = ocr.doOCR(bufferedImage);
                //过滤文字
                boolean isSensitive = handleSensitiveScan(map.get("content"), wmNews);
                if (!isSensitive) return isSensitive;
                imageList.add(bytes);
            }
        }catch (Exception e){
            e.printStackTrace();
        }
        //审核图片
        try {
            Map map = greenContentScan.imageScan(imageList);
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("REJECT")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }
                //不确定信息，需要人工审核
                if (map.get("suggestion").equals("REVIEW")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定性内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 审核纯文本内容
     *
     * @param content
     * @param wmNews
     * @return
     */
    private boolean handleTextAScan(String content, WmNews wmNews) {
        boolean flag = true;
        //如果
        if (StringUtils.isEmpty(wmNews.getTitle() + "-" + content)) {
            return true;
        }
        try {
            Map<String, String> map = greenContentScan.textScan(wmNews.getTitle() + "-" + content);
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("REJECT")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }
                //不确定信息，需要人工审核
                if (map.get("suggestion").equals("REVIEW")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定性内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    /**
     * 修改文章内容
     *
     * @param wmNews
     * @param status
     * @param reason
     */
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    /**
     * 从自媒体文章内容中提取纯文本和图片
     * 提取文章的的封面图片
     *
     * @param wmNews
     * @return
     */

    private Map<String, Object> handleTextAndImages(WmNews wmNews) {
        //存储文本内容
        StringBuilder stringBuilder = new StringBuilder();
        List<String> images = new ArrayList<>();
        //从自媒体文章内容中提取纯文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                if (map.get("type").equals("text")) {
                    stringBuilder.append(map.get("value"));
                }
                if (map.get("type").equals("image")) {
                    images.add((String) map.get("value"));
                }
            }
        }
        //提取文章的封面图片
        if (StringUtils.isNotBlank(wmNews.getImages())) {
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }
        Map<String, Object> resultMap = new HashMap<>();
        resultMap.put("content", stringBuilder.toString());
        resultMap.put("images", images);
        return resultMap;
    }
}
